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May 29, 1923. 1,456,851

C. F. KETTERING BINDING ELEMENT Filed Jan. 6, 1921 121755525 5 M? 4 C {W J Patented May 29, 1923.

v UNITED STATES 1,456,851 PATENT'OFFICEQ CHARLES 1*. KETTERING,- VOF DAYTON, OHIO, AssIGNoRfTocnNEnAL MOTORS RESEARCH CORPORATION, OF DAYTON, OHIO, A CORPORATION or nELA- WARE.

BINDING ELEMENT.

Application filed January 6, 1921. Serial NO. 435,417.. i

To all to hem it may concern:

Be it known that I, CHARLES F. KETTER- Inc, a citizenof the United States of America, residing at Dayton, county of Montgomery, and State of Ohio, have invented certain new and useful Improvements in Binding Elements, of which the following is a full, clear, and exact description.

The present invention relates to means for binding together an assembly of elements preparatory to heating in an induction furnace and in its preferred form ofembodiment relates particularly to a form of binding wire for holding in proper relation, copper cooling fins and internalcombustion engine cylinders prepari-itory to brazing the coolingtins to the cylinder in the process described in my U. S. Patent No. 13 53,358, dated May 1, 1923, on process of joining metals.

In furnaces. of the induction type, as is well known, when conducting materials are subjected to the influence of the nagnetic field generated by current flowing in the primary winding of such furnaces. currents are induced in the objects to be heated and heating results from the resistance of these objects to the passage of such induced current. In certain forms of furnaces, the induced currents are circuits set up in properly placed materials to be heated and in other forms these induced currents are eddy currents.

In the prior application, there is described specifically a process of brazing non-ferrous, specifically copper, cooling elements to ferrous metal cylinders by assem bling the cooling elements and cylinders, fastening the assembly together by use of an iron wire and heating the assemblyby heat generated in the assembly itself.

In that process it was found necessary to heat insulate the binding wires from the assembly and also to electrically insulate the endsot the wires from each other so as to break the circuit formed by the ring of wire around the assembly.

The present application relates specifically to a form of binding wire especially adapted for this last described operation.

The objects of the invention include the production of awire of the proper length which doesnot need to have insulating material twisted between its ends to break the circuit. Alsoa binding wire of the type just mentioned which shall be easily and economically preparedand quickly put in place".

Further objects and advantagesof the present invention will be apparent from the following descriptibn, reference being had to the accompanying drawing, wherein a preferred form of embodiment of theflinvention is clearly; shown. I

In'the drawing: i

Fig.1 represents an assembly of cylinder, cooling fins, and binding wire showing clearly the use of the wire.

Fig. 2 is an enlarged detail View showing a plan of the insulating plate.

Fig. 8 is a side View of the plate shown in Fig. 2. v i

In the drawing, 10 indicates an internalcombustion engine cylinder upon which is assembled a series of cooling fins 11, which fins are fastened in their proper relative position to the cylinder by means of wires 12, insulated from the fins by means of a suitable material, preferably asbestos, indicated at 13.

The binding wires 12 are made up in the present instance of two pieces of iron wire of suitable size, one end of each piece being inserted through the eye 20 of insulating plate 21. L

This. insulating plate is preferably of sheet metal covered with an insulating glaze and'will be ordinarily of the form indicated in Figs. 2 and 3 so as to make it conform to the contour of'the assembly.

It will, of course, be obvious that plates 21 intended for use with assemblies'other than cylinders and the like, as indicatedv in Fig. 1, may be of a suitable formto conform to thecontours of such assemblies.

In the use of this particular binding wire, the two pieces of iron wire properly attached to the plate form a continuous piece which is placed around the assembly and the free ends twisted as indicated at 30 in order to hold the assembly firmly together.

Further description of the operation is not considered necessary as it appears to be obvious from the description and illustration.

It will, of course, be understood that the insulating piece 21 may be made of any suitable material, although glazed metal is considered preferable.

While the form of mechanism herein shown and described, constitutes a preferred form of embodiment of the present invention, it is to be understood that other forms might be adopted all coming within the scope of the claims which follow.

WVhat I claim is as follows:

1. A means for binding together '(LSSGIIF blies of elements for treatment in induction furnaces, comprising a plurality of pieces of conducting material attached together by means of electrically insulating material.

2. A means for binding together assemblies of elements for treatment in induction furnaces, comprising a plurality of pieces of wire fastened together to form a con tinuous piece by means'of electrically insulating material.

3. A means for binding together assemblies of elements for treatment in induction furnaces, comprising two pieces of wire attached to a section of electrically insulating material so as to form in effect a single piece.

i. A means for binding together assemblies of elements for treatment in induction furnaces, comprising two pieces of wire connected by means of a metal plate which latter is covered with an electrically insulating glaze.

5. As a new article of manufacture a metal plate in the fori'n of a short strip having holes adjacent its ends and being entirely covered with an electrically insu latinp; glaze.

In testimony whereofl hereto afiix my signature.

CHARLES F. KETTERING. l/Vitnesses Lnn H. EMRICK, A. C. LEHMAN. 

